Antenna



FIG. 1 is a top perspective view of a preferred embodiment of an antenna.

FIG. 2 is a front elevation view of the antenna of FIG. 1.

FIG. 3 is a bottom plan view of the antenna of FIG. 1; and,

FIG. 4 is a side elevation view of the antenna of FIG. 1.

The broken lines are for illustration purposes only and form no part of the claimed invention. 

CLAIM The ornamental design for an antenna, as shown and described. 